Metal-bending machine



C. DECRETTE. METAL BENDING MACHINE.

APPLICATION FILED SEPT. 6, 19H).

7 BY 7 mag/wow 7 M ATTORNEY AU. w m dm 3 e t a D... Q & y es as I \N c. DECRETTE.

METAL BENDING MACHINE.

Patented Mar. 16,1920.

3 SHEETS SHEET 2.

l TTORNEY I EEEEEEEEEEEEEEEEEEEE IIIIIIIIIIIIIIIIII PT. 6 I 9 I 9. 1,333,75 1 I Patented Mar. 16, 1920. 3 EEEEEEEEEEEE 3.

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Be it kn n that CHARLES D E'k E, av

citizen of the United States, and rgsident of New Yorka nd New qrk, in hn s n y of. Siam-t New ;Yr have n ented erta n Bendmg Manhines, of whi h e fo lowi g [is a-specifieati n, Y r This inventi n ml e t metal binding machines, an

usifoif mainl jwt aprovide slwh which w b nd'mtal bars, beams; han elspl t ntermin-as bs qan ml manner so ,flwtih resultant ben Qtherrobjects -pf ny inyeniipnnre, to pro be! wi b du ab strong, and 'la t nggflie l 'QP- F L of; end n g n y simplsii-nd vidQf cilimefi'by.m ans of which f h M my e n ths fla o dg wis with Q m nedlplac bypne opsar tl n q lyynsfisi- I F g i4 i yertica l seqip al'v V ating'but one hin ng O th et l t0 pro ,gns'iiy, in terc:ha igeab le' bending. eli we simp a d nw i ii ayizis. to: a ford q i k ind a cnmte Prfsfsg 1 an bendi g asi q wh the met l is hea da i The aboye 13nd other obj ects will' bqqmg ppare ti t de cr pti n below, i wh c char wmrs of reference rgfer t o likengm9d parts on .the drawings,

Referringbmfly to theidiawings; Figilf Fig, "2 is af fiyont new of nthymzichine," partly injseution 9n Lhefine 2120f Fig: 1. f 3' is n: trdiisvei'se ,sectionalf 'yie w 10f lgutm nt h c iltaksn onthe lij i pmany i i mp thei dju a b Clamp- Fig- 5 ,is' .a diag m atic ewy h w ig t iQ PO Jii ILDf pm b'iolie andfi itebbend 'bemgnh wnindotmd: lines n Fig-L6 is a v tical s cti n ry ew t ken f2; 1,

sectional ew 10f me- Qf :th 'ma h ng n 'm ll e d apar i bars 9- ,and 0, m

sit ef viw ig-- i ab ii p iviviewoi the n pjmi bfi th c ine-1. fifi i' i Q din-det il in; the drawings,

ng upw rd; t e fi d b nd ngmfm. at;-

talchgdiiio :flw andar nd The lmye f, end of. ,the Solid bearing .5 fgr the 9f, he stipdard 2' san s ii s o tgr fulcrum v lif a ent nMal"16,19,2 5 mmmm semwe; 1. 1 eriai m aa22,9im -L, 1' I r m c w rko h -ma hin a const tu s' the; U-shamd bas .1, ts sfiandm d heavy; ful rum 19in oft'hebendingarm 4." The' upper portion pi 71 1 0 1 whiqh' th t i -pa fw .Q -themd -l g m PiYOtS, dihg a nea yf ndn V precise djl stment O f'th' parts.

' oth he fixed i d helpi'vfitedb iiding 13'. [Slidable in Said h adj t ng black lriwipmv ed th a l g d n lnin 15',

blocks 14:; v

m t l bar Q-"b b a c mpli hed by an iilpw ndly,ivexiienclirig bi aglgt 20 Qff the, ad-l ,il z lting' Pl t 17J-Whioh: is pr v dgdwi h an arms 7 gonsist 10f a double ba'r airangemgnfi and 1 0 vexten(1edi.jsidewis e,"v and fplr ning -n 'gu dei ay ll,- zm nati g i h ds; 2; miduidewayyfmme by fb th cla p bo t l6, pa s ng 'thno'ugh Ian} adjusting plate 17 having pins 18 r'egistgi? 7 ing with h l s 19 of t e-b ns, andi jliilabie .,a- :rbugh z djl lsiJ-ilellt v oi the v adjusting adjustmentbo1t2l fthe,a61 listing blqqks ioi'rfine adjiistmentin allongitlidinaal dgirQc- 151011 by turning th 'bolw h slot 15-, l wample. play folitiheqcla np'bolt;l6l;,jyhigh;" ga fterfinal adjustment made, tightens all 7 adju t/abl p v h se ar angemeni l ar 1 Q m hi both h xed nd ph n hand ent in the practice; of similar Construction,

mg arms and maybelchanged as is'lexp edi- I V lln z r s n: a; h d .ofit h a 1 ar ,slidablyinountd b wflQ ljfhe h 'S and min ay h any, rmj is h pe adaptable .to the nd nime a -to be f ntleured 0 he f ont53191 651191fi '1 bend n fl rm andh a t the bear ng 15 0 ward bent portion of theslide, is bolted to the bracket with bolts 32; "Bars 28 and;

31 on one side, and the upwardly bent portion 27, the bracket 30 and the top surface 33 of the slide26, between the bracket and theupwardlyibent portion 27, on the other side, form a guide for a transverseslide 34. The portion nearest tdtheguidewvay 11 of the slide 34; forms a head'35 provided with bolts36, with whichthe die 37 is secured to the head 35." The shape and form 1 ofthedie' correspond to the shape-of the metal-to be bent, asfindicated in Figsit and f j y A lug 38 is: formedwith the head 35, on

X .both sides of which two connecting rods 39 are pivotally attached at one end, the other end being also pivotally securedto a lug fl0," extending from the middle of the op- :eratingshaft 41, which has its hearings in the upwardly extending portion of the guides 27," 28, 30,. and 31*. The shaft 4:1

canbe easily operated by j power or by means of a handle 42. The procedure in bendinga metal baron the machine thus described is very simple and is indicated After metal bar is placed in the guides 22, which i the metal.

are broughtas close as possible to the bending point in order'to prevent bulging of Adjusting blocks 14 are shifted toward-both ends of the bar, the fine adjustment' being 7 made through adjusting bolts 21, and then the adjusting or abutment blocks. are firmly secured by the clamp bolts 16'. The die 37 1s next pressed against the heatedportion of the bar, the opposite side of which rests against the plate 43, at-.

V ta-ched to both .of the bending arms 3: and 4.

and working method of the bending niechacomprising a plurality ,undersides of the said arms,

Then the pivoted bending arm a is swung forward, bendingy the bar to the required angle.

"The abovepro ce ss; but especially {the novel feature of a simultaneous pressure playing on-the .die against the heated portion of the metal at the same time the actual bending process is taking place, not only facilitatesfthebending operation to a great extent, butobviously strengthensand shapes the bent portion of thebar and affords an exact predetermination of both the lengths of either-of the legs forming the angle, and the angle itself. The strengthening of the bend is caused by the peculiar-arrangement nism.

v having been heated sufficiently the vicinity ofthe bend to bemade, the

In applicants method, using his machine, 7

the outer fibers of the metal at the point of bending, are merely bent, and all the inner fibers are compressed. This is not so in ordinary methods, for ordinarily the outer fibers are stretched, the inner fibers are compressed, and a single layer of fibers at the center remain unaffected. It is for the aforesaid reaso'm that' applicants method strengthens the metal at the bending point.

Having thus described my-in'vention, what I claim and desire'to secureby Letters Patent is as follows:

1. A metal bending machine comprising abase, a hollow standard mounted uponsaid base, a fixed arm having "a! longitudinal guideway therein secured to said standard, vert cal shaft extending through said standard and havingmovable arm attached thereto, said movable arm having a longitudinal 'guideway therein, adjusting blocks slidably: mounted in" each of said guideways and each comprising a substantially substantially therethrough, a substantially L shaped member adjacent said T "shaped member, and having a hole through the-base thereof under the lower end of said channel, a screwpass hole-so said T ing "through said channel and said, as to tiegsa d L shapedmember and shaped member together, an ad usting screw mountedin the vertical arm of said L shaped member. and having its v tip contacting with Tshaiped member'lhaving avertical central channel extending Said Tishaped r, means for releasably securing} said blocks at any desired point intheir'respective guideways, andreleasable q means forholding the'metal tobe bent in secure "position at the point about which the bend. is to be made; y

2. A. metal bending machine comprising a basefa; hollow standard mounted upon said base, a fixed armhavrng' a longitudinal guidewayftherein secured to said standard,

tached thereto, said movable arm having ,a longitudinal guideway therein, adjusting blocks "slidably mounted in" each of said gu d ays tiallyT shaped member havingha vertical substantially central; channel extending therethrough, a substantially. L shaped mem-; ber adjacent said .T;

a vertical shaft extending through said standard and havlng a "movable arm' atill) andleach comprising 'a' substan- V shaped 'member and H having a holefthroughrthe base thereof under the lower end ofsaid channeh a 'serew-- V passing through said channel and, said hole 1 so as to tie said L shaped memberandsaid T shaped member together, an adjusting screw mounted in the verticala fm of said L shaped member and havingits tip contacting with,, said T shaped member, means for releasably securing'said blocks at any desired points in their respective guideways of recesses in the and a plurality 'tical shaft extending throug h said standard; and having a movable arm attached: thereto, 1 said movable arm having a longitudinal guideway extending therein, adjusting .15

11 made.

said L shaped member; said :pjns adapted to en eysaid-recesses, and means'for hold? ingt e metal tobe bent in secure position at the Aj' jmetal bending mach'ine 'comprising a base,'a hollow standard" mounted upon' said base, a fixed ar m having a longitudinal guideway therein secured to "said base-,-averblocks slidably mounted in each of Said guideways, means for releasably securing said blocks atany desired point in their respective guideways, means for releasably, and

- I securely holding the} metal to be bent comprising a bracket fixed to the. forward part of said fixed arm near said standard, a trough therein running parallel to said fixed arm, aflat 'bar slidably mounted in, said trough, rigidspaced a art members mounted-upon said bar at rig t angles to said trough and providing a guideway in the latter diriec tion, a second flat 'barfslidabl'y mounted. in saidlast-named-guideway and having a die holder ri id tdoneend, a'shaft pivotally supporter? between said rigid members, links connectingsaid die holder. and said shaft, and means for rotating said shaft.

4'. A metal bending machine com rising a base, a hollow standard. mounte guideway' therein secured to saidbase, a vertical shaft extendln' throughsaid standard and having a movab earm attached thereto,

' guidewa s, metal holding and guiding means "mounte Ways and troug slidably in said guideways and comprising substantially U shaped members having dependingl'base's engaging said guidemetal to be bent, additional means for re leasably and securely. holding said metal comprising a bracket fixedt'o the forward .part of said fixed armnearsaid standard,-

a trough therein runnin parallel to .said

pl fixed arm, a fiat bar sliably mounted in" a base, a hollow standard-mounted upon said said trough, rigid spaced "apart members mounted upon said bar at right angles "to said trough and providing a guideway in the latter direction, a second flatbar slidably mounted in said last-named guideway and having a die holder rigid to :one end, a; shaft pivotally supported betweensaid rigid members, links connecting saiddie holder .and said shaft, and means for rotating said shaft: f V v 5. A metal bending machine comprising and having a mova t g V p b v t0;'sai d-movable' armfh'avingiia longitudinal point about, whichthe'bend is tobe in said trough, rigidspaoedapartmembers mounted" upon said bar: at 1 right angles to P 1 said base, a fixed arm having a longitudinal "thereto, said" movable arm havin guidewayextending therein, means for re Y guidewa'y;therein secured to said base, a vet!" leasably-andsecurely holdingthenmetal to be bent comprising i a bracketv fixed to the forward part ofli'saidffixed armg'near said standard, a trough thereinrunning parallel to said fixed arm, a flat bar s'lida'bly mounted said trough and: providing a rguideway in, the latter direction,aisecondiflat bar slida; bly mounted in said last-named guideway and. havin a die holder rigid toone end,

ashaft plvotally' supported; between said; rigid members, links connecting said die holder and said sha'ftyand means. for rotating said shaft."

- 6. A metal bending machine comprisingga;

base, a hollow'standard mounted upon sald base, a fixed arm having a longitudinal guideway therein secured to said standard, a vertical-"shaft extending through, said standard and having a movable" arm attached thereto,-said movable arm having a longitudinal guideway' therein, adjustingblocks slidably mounted in each of said guideways and, each comprising! a substantially" T shaped] member having agvertical subst,an-'

tially central channel extending therethrough,-a substantially L shaped member adjacent said shapedmember and having a 7 hole through a the base thereof under the ilowerend ofsaid channel, a screw passing through said channel and saidihole so as 1 to bind together said L" shaped memberand said T shapedomember, adjustable means mounted :in' the upper part of the vertical.[

arm ofasaid Lshaped-- member and; contacting with said T shaped member, and releasable means for holding the'nictalt o bebent in secure positio'n 'at the pointjabout- V which the metaljis to be; bent. s adapted to receive the 'r- 7. Almetal bending-"machine. comprising a I base, a hollow standard mounted upon said base, amfixed armhaving' a' longitudinal ignideway therein Securedv to said standard, a vertical shaft extending through said standard and having amovable arm attached shaped member having a vertical substanaf longitially "central channelv extending}, there-f I through, a substantially L shapedmember "adj acent said 'T fshapedjmember and having a hole through the-base thereof underthe lower' end of said channeha screw passing through" said channel and said hole so as to holditogether said L shaped member and said Tshaped member, an adjusting screw mounted in the vertical arm of said L shaped member and; hating its tip leontacting with said Ti shaped member, means for releasably securing said blocks atfanyl de- ,slred point in their? respective iguideways comprising a plurality ofirecesses in the nndersides of said arms, and a plurality of forwardpart of said fixed arm near said standard, a; trough thereinrunning parallel to said fixed arm, afiat-loar slidably mounted r i :Signed' at New in said trough, rigid: spaced apart members mounted upon, said =bar at right angles to said trough land providing a guideway in the latter direction, a second flat bar slidahly mounted in said last-named guideway and having a die holder rigid to one end, a shaft pivotallysupported between said rigid-members, links connecting said die holder: and said shaft,'and means for rotating saidshaft.= a r 7 York, in the county of New York and StateofNe York, thisBOt-h day ofAugust, A; D. 1919.

OHARLESZDECRETTE. 

